Police said four people were at a Starhill Crescent home, north of Dixie Road and Sandalwood Parkway in Brampton, when officers were called at around 10:45 p.m. Friday.

Two women, 60-year-old Avtar Kaur and her 32-year-old daughter Baljit Thandi, were found dead inside the home. Police said both were fatally stabbed.

.@PeelPoliceMedia forensics officers have arrived at a Starhill Crescent home after police say two people were found dead inside with signs of trauma at around 11 p.m. Police said a person has been taken into custody. Homicide officers have been called in for the investigation. pic.twitter.com/cTx7hU0ALw

Police said Dalwinder Singh, a 29-year-old man and Thandi’s husband, was arrested at the house. He was charged with two counts of second-degree murder. There was also a child inside the home at the time, but police said they were uninjured.

At around 1 a.m. Saturday, officers were called to Marmac Crescent, south of Winston Churchill Boulevard and Burnhamthorpe Road West, in Mississauga with reports of a stabbing.

WATCH: Peel Police say they found two females in distress after responding to a call at a Starhill Crescent home.

“Officers attended the residence to do a residence check. Upon arrival, there was a female that was in obvious signs of distress,” Const. Bancroft Wright told reporters early Saturday.

The woman was subsequently pronounced dead.

Woman pronounced dead, two children transported to hospital from a stabbing at a home on Marmac Crescent near Winston Churchill Blvd & Dundas St in #Mississauga. Male suspect arrested, also taken to hospital. This is the 2nd domestic-related homicide tonight in Peel Region. pic.twitter.com/9kZvoVDf7A

Ontario’s police watchdog, the Special Investigations Unit (SIU), announced Saturday it invoked its mandate. The agency said the arrested man was diagnosed with a serious injury after a previously-undisclosed “interaction” with police. It’s not clear what happened during that interaction.

The SIU is an independent agency that investigates incidents involving police that have resulted in death, serious injury or alleged sexual assault.

Wright called both incidents “unfortunate.”

“We’ll have at least four families that have been affected by this on this night,” he said.

#PRP in the area of Starhill Cres and Arabia Gate #Brampton for an investigation. Male arrested on scene, Homicide Bureau will be attending. Isolated incident, No public safety concerns pic.twitter.com/xvk5tyxYYB